Test Method 189-2012
Content of Carpet Fibers
in 2000 by AATCC Committee RA57.
1. Purpose and Scope
1.1 This method is for determining the amount of fluorocarbon soil-resist
agent present on carpet fibers by measurement of elemental fluorine on the pile
fiber. This method is useful for measurement of fluorocarbon present on carpet
pile fiber as tested within the practical range of 100-1000 µg/g (ppm).
It may also be used for yarns treated with fluorocarbon anti-soiling agents.
2.1 A weighed fiber specimen is burned in an oxygen combustion flask and the
released hydrogen fluoride is absorbed into a sodium hydroxide solution. The fluorine
content is measured as dissolved sodium fluoride at a constant pH and ionic strength
using a fluoride ion activity electrode and a specific ion meter.
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